The official bi-annual London meetup for fans of the popular blog [Astral Codex Ten](https://astralcodexten.substack.com/) (formerly [Slate Star Codex](https://slatestarcodex.com/)) by American psychiatrist [Scott Alexander](https://twitter.com/slatestarcodex).

**Please register to attend: [https://luma.com/ACX-London-Sep-2025](https://luma.com/ACX-London-Sep-2025)**

​The meetup will be held at [Newspeak House](https://newspeak.house/) and is organised by [Edward Saperia](https://bit.ly/edsaperia). There will be light refreshments and an ongoing [unconference](https://www.improbable.co.uk/open-space). Donations go to catering and venue costs.

​T﻿o be notified of future meetups, you should subscribe to [ACX London](https://groups.google.com/g/acxlondon), and you might also want to check out [London Rationalish](https://www.lesswrong.com/groups/L2rpiNbg7YcAnqD3S), [LessWrong Events](https://www.lesswrong.com/community), and [Effective Altruism UK](https://effectivealtruism.uk/events).

Newspeak House

Astral Codex Ten London

London Rationalists

Science & Education

Intellectual Discussions

Critical Thinking

Rationality and Reasoning

Public Policy

Pharmaceutical Sciences

London

Psychology

Policy

AI and Society

Artificial Intelligence

Effective Altruism

Philo

greg sidier

Charles Mackenzie

George Wellby

Michael Nedzelsky

Nicholas Bender

Astral Codex Ten Meetup

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Astral Codex Ten Meetup

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